Gotham by Gaslight is a DC Comics one-shot by Brian Augustyn and Mike Mignola, with inks by P. Craig Russell. It spawned a sequel, Master of the Future (1991), also written by Augustyn, but with art by Eduardo Barreto.

Although not originally labeled as such, Gotham by Gaslight is now considered to be the first Elseworlds story, where DC Comics heroes are taken out of their usual setting and put into alternate timelines or realities. Subsequent printings have included the "Elseworlds" logo.